JEE-ADVANCED SERIES Mathematics
Probability Meaning
1 previous year questions.
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1998 Chapter Questions 1 MCQs
01
PYQ 1998
medium
mathematics ID: jee-adva
There are four machines and it is known that exactly two of them are faulty. They are tested, one by one, in a random order till both the faulty machines are identified. Then, the probability that only two tests are needed, is
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